Answered: is 25 cm long having a cross-sectional…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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In a falling head permeameter, the sample used is 25 cm long having a cross-sectional area of 24 cm². The cross-sectional area of the standpipe is 2 cm². The sample of soil is made of three layers perpendicular to the direction of the flow. The thickness of the top layer is 8 cm and has a value of k₁ = 4 x 10^-4 cm/sec, the second layer of thickness 10 cm has k₂= 6 x 10^-4 cm/sec, and the bottom layer of thickness 7 cm has k₃ = 8 x 10^-4 cm/sec.

Calculate the time required for a drop of head from 25 to 12 cm. ( in minutes).

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